Motorcycle frame



FIG. 1 is a perspective view showing my new design;

FIG. 2 is a right side view;

FIG. 3 is a left side view;

FIG. 4 is a top view;

FIG. 5 is a bottom view;

FIG. 6 is a front view; and,

FIG. 7 is a back view of the design.

The broken lines adjacent the shaded areas represent the bounds of theclaimed design, and the broken lines showing portions of a motorcycleframe, form no part of the claimed design.

The ornamental design for a motorcycle frame, as shown and described.